Upvote:4
Aprove answer
UIGraphicsBeginImageContext(targetSize);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetInterpolationQuality(context, kCGInterpolationLow);
...
Upvote:1
CGImageRef imageRef = CGImageCreateWithImageInRect([self CGImage], theRect); // e.g. theRect={{100,100, {200, 200}}
UIImage *finalImage = [UIImage imageWithCGImage:imageRef];
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